In early November of last year, I shared some remarkable data from a groundbreaking study published by the European Central Bank (ECB).

The study looking at public sector efficiency (PSE) in developed nations and found that “big governments spend a lot more and deliver considerably less.”

Later in the month, I wrote about a second ECB study that looked at a broader set of nations and further confirmed that smaller government produces better results.

The first ECB study clearly concluded that “small” government is more efficient and productive than either “medium” government or “big” government. Based on the second ECB study, we can conclude that it’s even better if government is…well, I guess we’ll have to use the term “smaller than small.”

Today, we can augment this research by looking at a new study from the International Monetary Fund.

The IMF’s new working paper on “Fiscal Decentralization and the Efficiency of Public Service Delivery” shows that it’s not only good to have small government, but that it’s also good to have decentralized government. Here are the main findings.

This paper analyzes the impacts of fiscal decentralization on the efficiency of public service delivery. …The paper’s findings suggest that fiscal decentralization can serve as a policy tool to improve performance… an adequate institutional environment is needed for decentralization to improve public service delivery. Such conditions include effective autonomy of local governments, strong accountability at various levels of institutions, good governance, and strong capacity at the local level. Moreover, a sufficient degree of expenditure decentralization seems necessary to obtain a positive outcome. And finally, decentralization of expenditure needs to be accompanied by sufficient decentralization of revenue to obtain favorable outcomes.

Here’s some explanation of why it’s better to have decisions made by sub-national governments.

Local governments possess better access to local preferences and, consequently, have an informational advantage over the central government in deciding which provision of goods and services would best satisfy citizens’ needs. …Local accountability is expected to put pressure on local authorities to continuously search for ways to produce and deliver better public service under limited resources, leading to “productive efficiency.” …Decentralization…encourages competition across local governments to improve public services; voters can use the performance of neighboring governments to make inferences about the competence or benevolence of their own local politicians… Fiscal decentralization may lead to a decrease in lobbying by interest groups.

But that’s a good thing. I want to “obstruct” economically destructive redistribution.

Now let’s look at the specific finding from the study.

…expenditure decentralization seems to improve the efficiency of public service delivery in advanced economies… To quantify this effect, one could say that a 5 percent increase in fiscal decentralization would lead to 2.9 percentage points of efficiency gains in public service delivery. …about one third of public expenditure would need to be shifted to the local authorities to obtain positive outcomes from fiscal decentralization.

Though it’s worth emphasizing that decentralization works when the sub-national levels of government are completely responsible for raising and spending their own money.

Revenue decentralization shows positive and statistically significant impacts on public service delivery for advanced economies and emerging economies and developing countries. …These findings might imply the need to accompany expenditure decentralization with sufficient revenue decentralization to ensure improvement of performance.